Razor-stropping machine.



E. B. GIBPORD.& W. P. WELCH. RAZOR STROPPING MACHINE.

APPLICATION FILED APILZO, 1912. HENEWLD APR. 23.1913.

Patented Sept. 23, 1913.

llururn E. B.'GIB}`ORD in Wa P. WELCH. .RAZOR SIRUPPING IJIAGHINE. AMLIUATION FILED Ammo, 1012. mmmwnn APR. za, 101s.

1,074,095, Patented 36115.23, 1913.

minnaar .'uurntnrs Atturnm io'nr'rlen EDWARD GIBFORD .ANDWILLIAM I?. WELCH, OF ADRAN, MICHIGAN; SAID .VELCH ASSIGNOR TO GRRET'I O. VVHIGHT. OE" ADRIAN, MICHIGAN.

ll RAZ-STROPPING MACHINE.

pompons..

.Patented Sept. ,'23, i913.

Application filed Apr-i120, 1912` Serial No. {532,tT7. .Renewed April 23, 1913. Serial No. 763,182.

To ri/t/ 1li/wm 'it may concer/i lc il, known that; we, llnwnnn B. (ilnironn and Winnaar 1'. VVin,o11,eitwizc1is of the United States, residing at. Adrian, in the county of Lenawee, State ot illichigan, have .invented certain new and useinl lnipri'nfe ments in RazonStroppine Machines; and we do declare the following to be a iliull, clear, and exaurtvdeacription of the invention, such a will enable others Skilled in theart to which it appertaine lo nialic and noe the saine, reference being had to the -accoinpanying drawings, and to the characters; ol reference inarlced thereon, which 4torni a partv of this apecileation.

This invention relates to machines .for .atropping rarir blades, especially designel'l for etropliing the blades oitE safety razors, and insists in the construction and arrange nient oi'v parts hereinafter` more fully eel, forth and pointed out particularly in the claiine.

The. object oit' the invention is to provide simple and cllicient means for etropping safety razor blades, wherein provision is niadc :t'or antoniati ally turning the blade holder from side to side so as to successively larry the edge ofthe blade into contact. wil h the Surlaco of the strop, as the parte carw rving the blade are rociprocated upon the strop.

llhe` invention contemplates such an arrangement of parte as will enable the blade lo he urged with cinisidorable pressure agaiaat the face o't" the strop during the longitudinal movement of the 'traine and blade bolder thereolnand further contemplates the mounting ol the blade holder and traine upon a looped strop havingl two abrasive surfaces, .into action with either one of which the blade may be brought by, sliding` the ltraine around the loop ofthe strop.

the above obli-ot is attained by the apparatu` illnatrated 1n the accompanying .dia-wings, in which lfigurc l is a perspective View of a etropping` device embodying our invention, 1n operative position upon a strop, the ends of the strop being broken away. Fig. 2 is a seclion through the device longitudinally of the strop Showing the position ol" the blade ln'ilderu when the fraaie is being' moved upon the strop toward the right. llig. 3 is a similar View showing the posh tion ol' parte when the frame is beingl nioved upon the sirop toward the left.. Fig. t is a Section ainiilar to Fie'. and Z5 .allowing the blade holder in the act oit wringing. Fig. 5 is a plan view ol the reciprinaitory lil-anic detached l'roin the inain l'ranic npon which it ia adapted to be nionnied. liig. o is a plan View ol' the inain l'ranie and the reciprocalor)y t'raine mounted thereon, willi the blade holder omitted and the connecting rods4 oll the reciprocalor \r llraine lnolien away. Fig. 7 is an enlarged tragnienlanv View in section, as on line 'l' oi' Fig. l. Fig. 8 is a perspective iiew :showing the looped strop and the atroppcr mounted thereon. a portion ot' the strop being broken away. Fig. 9 is an edge elevation ot the etrop showing the manner ol' passing the stroppc' around the loop :lroni one side to the other of the si rop. Fig. l() is a t'ragineiilaryy View in plan illustrating the two abrasive eurliacerl ot the strop.

Referring to the drawings, by the characlera4 of reference marked thereon, l designates the main ifi-aine, which i5 'torrued of stamped nietal and (comprime` tho Vllan} ed aide lneinbera .2 connected by the tranbverre end portions L*truck out ot the central portion ot the main traine is a rectangular spring lranie. comprising parallel side liars -l connected by end pieces 5, said end pieces being in turn attached to the sides ot the niain lranic. V

'.lhe razor strop t is a double or looped strop, and is ol' fabric, preferably webbing, to render it. flexible, the aurlace thereof being tzrcaleffl lo give the desired abrasive ell'ect, said Aatrop being adapted to lie between the t'langes of the niain liralne and in practice is threaded So as to pass under the bara land lie upon the end portions 3 ot the inain fran'ie, am clearly shown in Figs. 1.5, il and fl, said bara `il being slightly curved or rounded, so as to facilitate the threading ol' the strop throng-h the frame. 'lhe spring of the barsl l is sullieient to exert the necessary tenpion upon the strop (5 to atl'ord the required resistance to the movement ol' the Inain il'anie upon the strop, but will allow said 'l'ranie to Slide upon the Sirop when snllieienl pressure is exerted to overcome said friction. 'l'he blade holder T coni'pria ing` closed spring jaw` between whioh the blade tw' is adapted to be held, 'is lixcd to n shalt Si which extends between and is journaled in the aide flanges E2 ot the niain i'rame. Also fixed to the :shaft 9 at each end thereof a rocling head 10. These heade are adapted to turn with the shaft, 9, and are each provided in the` opposite. sides thereof with the .eziinvvays l1. Formed in -the side iiangea?J of the main frame are the longitudinal slots 12. i

Mounted to reciprocate upon the .main frame is a sliding frame eomprieing the end portions 13 connected by a transverse strip 11h.' The end portions 13 of the sliding frame are adapted to embrace the eide flanges 2 of the main frame, and the strip 1d to lie underth'e strop, as shown in Fige. Q, 3 and et. To attach the sliding trame to the main frame, 'transverse rods 15 are employed 'which are secured at their ends in the ends 13 of the sliding frame, and which pass through the slots 12 in the main frame. The space between the rods 15 is equal to the distance between the outer ends of the cam-ways 11 in the rocking heads 1). and the parte are so disposed that one or' said rods is at all times in enga-freinent in one off said Ways. lt will be noted that the line of the slots 12 is below the pivotal point of the shaft 9 of the blade holder. By reciprocating Ithe sliding frame upon the main frame, the rods 1:3 will successively enter into and pass 'from the cam-Ways 11 in the rocking;` heads, imparting to Said heads "a rocking` movement in onposite directions, thereby swinging the blade holder from side to side. With the parts in the position shown in Fig. 2, the initial movement of the Sliding frame toward the; left will cause the rod 15, which is lying in the lower cani-way in the head 10, to swing' said head to the right, thereby turning' the shaft 9 in' the Same direction and swinging),` theblade holder toward the right. As the first rod in this operation passes from engagement with the slot of the lower eide of the head, said head will have assumed such a position aS to allow the second rod to enter the slot on 'the opposite side, whereby the swinging movement of the head to the right. is continued to the limit of the movement of the sliding frame, said parts being arrested only when the position shown in Fig'. 3 is reached, in which position it Will bei noted that the rod 15.

which is in engagement in the slot 11 in the rocking head bears forcibly against the terminal portion of the slot, so as to constantly urge the blade 8 into contact with the strop. By continuing the pressure upon the sliding frame in the Same direction, ait'er' the parte shall have reached the position shown in Fig. 3, it will cause the main frame to slide longitudinally of 'the strop and -Will'drag the edge of the blade over the face thereoic to effect the requiredV abrasive .action upon the blade, as will be Well understood, 'Upon reaehino4l the limit of the moi/ement toward lett, pressure is en nef/noaa in 'the lower cam-way or the roet to swing; said head toward the lern,

n head ytrat/ed in Fig. 4;, the parte being so dielposed, that, as the first rod pas es from one of the cam-Ways 11 in the head, the Second rod will enter the opposite cairertv-ay,A and h. engage? complete 4the swinging operation, to

carry the blade into contact vWitlrthe strop on the' opposite' side, as Shown. in. 0

after which a further pressure upon the eld-` ing frame will canee the :lain l? imo to slid thereby drawing; the Eint- A over the tace 'the strop and in contact t. ere

Tit will now he underatood tiret 'the initial operation or moving 'the slidirig1 op erates to swing the blade holder and that 'further pressure upon said frame to slide it will slide the main iframe longitudinally or` the strop, completing the stropping operation, as will be ivell understood, the `blade holder swingimq` in reciprocal succession from side to eide accordingly the slidi115n frame is reciprocated and frame is caused to slide :il y a eontimied pressure on the im. the same direction.

rl`he end portions of the Sliding; are curved outwardly Shown at 16, 'thereby enabling` `said end-portiona to be readily grasped between the thumb and linger to tm cilitate the manipulation ot the stro-p.

.lt Will be noted tha1L the edge oit' the blade S swings into contact with the strop before the forward rod 15 of the slidingl i'rame engages the limit of the slot i2, whereby the pressure' neceesary to slide the main frame upon the strop is employed to constantly urge the edge of the blade into contact 'with the Surface oi 'the strop with euch torce to produce the .necessary abrasive action. It will further be noted that the'initifii ment of the sliding frame operates to airing the blade. holder, eo that the cutting' oi strop, throughv the failure of the blade to' lift therefrom when the direction. er 'iie've ment ie changed, obviated. Y

To confine the ends of the strop, e fold plate 1 7 is employed, which embraces e i ends and is secured thereto by a transverse Screw 18 (see Swiveled in the .ate 17 is an eye 19 adapted to engage a station ary lloolr for holding` the strop during 'the operation of stropping. By this arrangew ment, the strop may be turned to present either of its sides uppermost, 1ii/lienmo d" ed on the strop, as shown in Figs. d the trame cannot be removed, therefrom efreept by withdrawing the screw 1 8. The loep 20 of the strop dimmM reitadinaliyu One portion er the strop e g from loop is provid 'with a, s nog sur: ice 21, and the ott 1 .nd strop e tending from eine; loop in tne opposite dithe main rection is provided with a linishing surface 22, as illustrated in Fig. 10. llhe stropper is first'operated upon the strop to cause the blade to engage with the sharpening surtace 21, after which the stropper is passed around the loop of the strop, as illustrated in Fig. 9, to bring the blade into operation with the finishing surface 22, the swiveled eye 19 enabling the strop to be readily turned over for this purpose. 4

The character of the blade holding frame is such as to enable a looped strop of the character shown and described to be 'employed, because of the fact that the only element lying between the parallel surfaces of the strop is the transverse strip 14. This is a matter of considerable importance as it provides for a sharpening and a finishing strop in one, and enables the stropping frame to be readily moved upon the strop, so as to `bring either of said surfaces into operative relation with the blade when the stropping frame is reciprocated. rl`he loop 20 enables the strop to be readily held during the operation of st-ropping.

Having thus fully set forth our invention, what we claim as new and desire to secure by Letters 'Patent is l. A opping machine comprising a main iframe having parallel sides and a bottom, one of the sides ot said 'frame having a lon gitudinal slot, a strop lying in said frame between said sides and having frictional-engagomcnt with said bottom, a blade holder pivoted between said sides to swing, a rocking head on the shaft of the blade holder having calneways therein, a slidel mounted to reciprocate on the main frame, and meinbers attached to said slide passing laterally through said slot and engaging in the camt* ways in said rocking head to cause the blade holder to swing from side to side assaid slide is reciprocated.

2. A stropping machine comprising a main frame having flanged sides, said sides being each provided with a longitudinal slot, a blade holder` pivoted in the sides of the main frame above said slots, a rocking head on the pivot of the blade holder having cam ways therein, a sliding frame mounted on the main iti-anne having parallel sides, transverse rods carried by and connecting the sides of the sliding frame, said rods passing through said slots and engaging in the ca1n-ways of said rocking head, whereby said head is caused to rock to swing the blade holder as said sliding frame is 1'eciprocated.

2l. A .stropping machine comprising a main frame having parallel sides and a bottom, a spring traine struclrfrom the bottom thereof, a strop threaded through the main frame to pass below said spring 'frame and lie upon the end portionsA of said main trame, the sides of the main iframe having` longi tudinal slots, a sliding trame mounted on the main frame to freely reciprocate, a blade holder pivoted to the sides of thc main frame, a rocking head ou the pivot of the blade holder, and members on the sliding traine extending through said slots and cngaging said head to canse the blade holder to swing from side to side as the sliding iframe is reciprocatei'l.

ln testimony whereof, we sign this Specification in the presence of two witnesses.

EINVARD B. GIBFORD. W ILLIAM l. 'ilf'llLCI-I.

Witnesses lV. (l. ENGEL, 'Lehman l". BEAN. 

